#include <stdio.h>

main(){
    int f, c;
    int lower, upper, step;

    lower = 0;
    upper = 300;
    step = 20;

    printf("华氏温度与摄氏温度转换表（逆序）\n");
    printf("华氏\t摄氏\n");

    f = upper;

    while (f >= lower){
        c = 5 * (f - 32) / 9;
        printf("%d\t%d\n", f, c);
        f = f - step;
    }
}
